UPDATE 1-Japan's KPI reports oil leak near naphtha tank

* No fire from leaked oil -fire dept

* Firm says trying to contain leak

* Cannot say if any impact on refining, shipments

TOKYO, Feb 9 (Reuters) - Japanese refiner Kyokuto Petroleum Industries (KPI) on Thursday confirmed an oil leak near one of the naphtha tanks at its sole 175,000 barrels per day Chiba refinery, east of Tokyo, a company official said.

The firm was trying to contain the leak and collect the spilled naphtha, the official said, adding that he could not comment on whether the incident would have any impact on refining operations or shipments.

An official from the local fire department said the incident was reported at around 11 a.m. (0200 GMT) on Thursday, though there was not thought to have been a fire.

KPI is a 50-50 joint venture between the ExxonMobil Japan group, Japan's second-largest oil refiner, and Mitsui Oil Co, a subsidiary of Mitsui & Co.